diff --git a/RemoteCaptury.cpp b/RemoteCaptury.cpp
index e646be9..c962e20 100644
--- a/RemoteCaptury.cpp
+++ b/RemoteCaptury.cpp
@@ -566,6 +566,8 @@ const char* Captury_getHumanReadableMessageType(CapturyPacketTypes type)
 		return "<get framerate>";
 	case capturyFramerate:
 		return "<framerate>";
+	case capturyBoneTypes:
+		return "<bone types>"
 	}
 	return "<unknown message type>";
 }
@@ -1219,6 +1221,7 @@ static bool receive(SOCKET& sok)
 						actor->joints[j].orientation[x] = cacp->joints[k].orientation[x];
 						actor->joints[j].scale[x] = 1.0f;
 					}
+					actor->joints[j].boneType = CAPTURY_UNKNOWN_BONE;
 				}
 				break; }
 			case 2: {
@@ -1232,6 +1235,7 @@ static bool receive(SOCKET& sok)
 						actor->joints[j].orientation[x] = jp->orientation[x];
 						actor->joints[j].scale[x] = 1.0f;
 					}
+					actor->joints[j].boneType = CAPTURY_UNKNOWN_BONE;
 					strncpy(actor->joints[j].name, jp->name, sizeof(actor->joints[j].name)-1);
 					at += sizeof(CapturyJointPacket2) + strlen(jp->name) + 1;
 				}
@@ -1247,6 +1251,7 @@ static bool receive(SOCKET& sok)
 						actor->joints[j].orientation[x] = jp->orientation[x];
 						actor->joints[j].scale[x] = jp->scale[x];
 					}
+					actor->joints[j].boneType = CAPTURY_UNKNOWN_BONE;
 					strncpy(actor->joints[j].name, jp->name, sizeof(actor->joints[j].name)-1);
 					at += sizeof(CapturyJointPacket3) + strlen(jp->name) + 1;
 				}
@@ -1283,6 +1288,14 @@ static bool receive(SOCKET& sok)
 			}
 			unlockMutex(&mutex);
 			break; }
+		case capturyBoneTypes: {
+			CapturyBoneTypesPacket* cbt = (CapturyBoneTypesPacket*)p;
+			lockMutex(&mutex);
+			CapturyActor_p actor = actorsById[cbt->actorId];
+			for (int i = 0; i < std::min<int>(actor->numJoints, size - sizeof(CapturyBoneTypesPacket)); ++i)
+				actor->joints[i].boneType = cbt->boneTypes[i];
+			unlockMutex(&mutex);
+			break; }
 		case capturyCamera: {
 			CapturyCamera camera;
 			CapturyCameraPacket* ccp = (CapturyCameraPacket*)p;
diff --git a/RemoteCaptury.h b/RemoteCaptury.h
index 15c45ee..6a88633 100644
--- a/RemoteCaptury.h
+++ b/RemoteCaptury.h
@@ -461,6 +461,7 @@ typedef enum { capturyActors = 1, capturyActor = 2,
 	       capturyDisableRemoteLogging = 77,
 	       capturyGetFramerate = 78,
 	       capturyFramerate = 79,
+	       capturyBoneTypes = 80,
 	       capturyError = 0 } CapturyPacketTypes;
 
 // returns a string for nicer error messages
@@ -941,6 +942,15 @@ struct CapturyFrameratePacket {
 	int		denominator;
 };
 
+// sent to client
+struct CapturyBoneTypesPacket {
+	int32_t		type;	// capturyBoneIndices
+	int32_t		size;	// size of full message including type and size
+
+	int32_t		actorId;
+	uint8_t		boneTypes[];
+};
+
 #pragma pack(pop)
 
 #ifndef FOURCC
diff --git a/captury/PublicStructs.h b/captury/PublicStructs.h
index 8316f59..925e605 100644
--- a/captury/PublicStructs.h
+++ b/captury/PublicStructs.h
@@ -5,12 +5,75 @@
 
 #pragma pack(push, 1)
 
+enum CapturyBoneTypes {
+	CAPTURY_UNKNOWN_BONE = -1,
+	CAPTURY_HIPS = 0,	// the joint where legs attach to the spine
+	CAPTURY_SPINE,
+	CAPTURY_NECK,
+	CAPTURY_HEAD,
+	CAPTURY_LEFT_CLAVICLE,
+	CAPTURY_LEFT_SHOULDER,
+	CAPTURY_LEFT_ELBOW,
+	CAPTURY_LEFT_WRIST,
+	CAPTURY_LEFT_THUMB_METACARPAL,
+	CAPTURY_LEFT_THUMB_MEDIAL,
+	CAPTURY_LEFT_THUMB_DISTAL,
+	CAPTURY_LEFT_INDEX_METACARPAL,
+	CAPTURY_LEFT_INDEX_PROXIMAL,
+	CAPTURY_LEFT_INDEX_MEDIAL,
+	CAPTURY_LEFT_INDEX_DISTAL,
+	CAPTURY_LEFT_MIDDLE_METACARPAL,
+	CAPTURY_LEFT_MIDDLE_PROXIMAL,
+	CAPTURY_LEFT_MIDDLE_MEDIAL,
+	CAPTURY_LEFT_MIDDLE_DISTAL,
+	CAPTURY_LEFT_RING_METACARPAL,
+	CAPTURY_LEFT_RING_PROXIMAL,
+	CAPTURY_LEFT_RING_MEDIAL,
+	CAPTURY_LEFT_RING_DISTAL,
+	CAPTURY_LEFT_PINKY_METACARPAL,
+	CAPTURY_LEFT_PINKY_PROXIMAL,
+	CAPTURY_LEFT_PINKY_MEDIAL,
+	CAPTURY_LEFT_PINKY_DISTAL,
+	CAPTURY_RIGHT_CLAVICLE,
+	CAPTURY_RIGHT_SHOULDER,
+	CAPTURY_RIGHT_ELBOW,
+	CAPTURY_RIGHT_WRIST,
+	CAPTURY_RIGHT_THUMB_METACARPAL,
+	CAPTURY_RIGHT_THUMB_MEDIAL,
+	CAPTURY_RIGHT_THUMB_DISTAL,
+	CAPTURY_RIGHT_INDEX_METACARPAL,
+	CAPTURY_RIGHT_INDEX_PROXIMAL,
+	CAPTURY_RIGHT_INDEX_MEDIAL,
+	CAPTURY_RIGHT_INDEX_DISTAL,
+	CAPTURY_RIGHT_MIDDLE_METACARPAL,
+	CAPTURY_RIGHT_MIDDLE_PROXIMAL,
+	CAPTURY_RIGHT_MIDDLE_MEDIAL,
+	CAPTURY_RIGHT_MIDDLE_DISTAL,
+	CAPTURY_RIGHT_RING_METACARPAL,
+	CAPTURY_RIGHT_RING_PROXIMAL,
+	CAPTURY_RIGHT_RING_MEDIAL,
+	CAPTURY_RIGHT_RING_DISTAL,
+	CAPTURY_RIGHT_PINKY_METACARPAL,
+	CAPTURY_RIGHT_PINKY_PROXIMAL,
+	CAPTURY_RIGHT_PINKY_MEDIAL,
+	CAPTURY_RIGHT_PINKY_DISTAL,
+	CAPTURY_LEFT_HIP,
+	CAPTURY_LEFT_KNEE,
+	CAPTURY_LEFT_ANKLE,
+	CAPTURY_LEFT_BALL,
+	CAPTURY_RIGHT_HIP,
+	CAPTURY_RIGHT_KNEE,
+	CAPTURY_RIGHT_ANKLE,
+	CAPTURY_RIGHT_BALL
+};
+
 struct CapturyJoint {
 	char		name[64];
 	int32_t		parent;		// index of parent joint or -1 for root node
 	float		offset[3];	// offset to parent joint
 	float		orientation[3];	// XYZ quaternion - w needs to be reconstructed (w >= 0)
 	float		scale[3];	// local scale
+	int8_t		boneType;	// knowing which functional bone it is can make retargeting easier
 };
 
 struct CapturyBlendShape {